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D. ALMY.

STEAM GENERATOR.

No.434,227. Patented Aug.12,18-90.

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' D. ALMY.

STEAM GENERATOR.

No. 434,227. Patented Aug. 12, 1890.

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D. ALMY. STEAMGENERA-TOR.

No. 434,227. Patented Aug. 12,1390.

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DARIVIN ALMY, OF PROVIDENCE, RHODE ISLAND.

STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 434,227, dated August 12, 1890.

Application filed October 31, 1889. Serial No. 328,814. (No modeL).

To all whom it may concern.-

Be it known that I, DARWIN ALMY, of the city of Providence, in the .county of Providence and State of Rhode Island, have invented a new and useful Improvement in Steam-Generators; and I hereby declare that the following is a full, clear, and exact description of the same, reference being bad to the accompanying drawings, forming part of this specification.

This invention has reference to an improvement in the construction of the class of steamgenerators known as tubular or pipe boilers.

The invention consists in the peculiar and novel construction by which the pipes forming the two sides of the fire-box are extended each over the f u rnace toward the center and multiple.

The invention further consists in the 'novel construction of the T-shaped steam-multiple and the connections of the tubes or pipes with the same.

The invention further consists in the novel construction of the steam-separator and-its connections with the steam and water multiples.

The invention also consists in the peculiar construction of the feed-water heater and its connection with the water-multiple and the sediment-collector of the steam-generator; and the invention also consists in the combination of various improvements with each other and the steam-generating pipes to form a complete steam-generator of novel construe tion, combining great steam-generating capacity with small space and weight, as will be more fully set forth hereinafter.

In the drawings similar numbers of reference indicate corresponding parts.

Figure 1 is a front elevation ofmy improved steam-generator. Fig. 2 is a vertical crosssection of the same on the line A B. Fig. 3 is a longitudinal section on the line C D, and Fig. i is a horizontal sectional View of part of the steam-multiple and the separator on the line E F.

The number 5 indicates the water-multiple, consisting of a large tube, inclosing three sides of the furnace, having a straight section which forms the rear, and two straight arms extending along the sides of thefurnaee, the front end being open.

U indicates the grate; 7, the ash-pit; 8, the fire-door. The nipples 9 extend from the multiple 5 upward, and to each one is secured a two-branch fitting 10, and to each one of the two branches of the fitting 10 a pipe or tube is secured. The pipes 11, forming the sides of the furnace, extend upward to near the top of the furnace, where they connect with the horizontal pipe 12, extending 'over the fire to near the center of the furnacechamber, and also connect with the vertical pipes 13. The connections between the pipes 11, 12, and 13 are made by suitable bends or elbows. The upper ends of the pipes 13 are connected with the fitting 14:, which has four branches uniting into one outlet, so that two of the pipes 13 from each side of the furnace are secured in one fitting 1a, and as these two pipes 13 are connected by means of the pipes 12 and 13 with a two-branch fitting 10 on opposite sides of the furnace, great flexibility and freedom to expandand contract' under changes in temperature are secured. The founbranch fitting 14: is secured to nipples 15, projecting downward from the steammultiple 16.

The steam-multiple 16 has the form of the letter T, the cross-arms being placed along the front of the generator, the stem extending from the front to the rear over the center of the steam-generator. All the pipes 1l,forming the sides of the furnace, extend from the side arms of the water-multiple 5 through the pipes 12 and 13 to the central stem of the steam-inultiple 16, thus forming the sides and the roof of the fire-box or furnace.

From the two-branch fittings 10, secured to the rear section of the water-m ultiple 5, the pipes 17 extend upward, and each one is connectcd at the rear of the steanrgenerator with one of the coils 18, extending forward and backward over the pipes 12 and at right angle to the same. Three lines of pipe are shown in the coils 18; but five, seven, or more may be used. The ends of two of the coils 18 are connected with the front arms of the steam-m ultiple 16 by two-branch fittings like the fittings 10.

By the use of the two and four branch fittings the construction of a pi pe-boiler is greatly simplified, as by their use the connections with both multiples are greatly i'e- (luced, as in the steam-multiple only onefourth the number of holes and in the watermultiple only one-half the number of holes formerly required are used, and with the two and four branch fittings more material is left to sustain the internal pressure.

The two pipes 19, connected with the rear water-multiple,extend above the coils 18 and connect each with the pipes 20, and,by means of the bent tittingspvilh the pipes21, and unite in the T-fitting 22, which is connected with the coil 23 at the rear of the generator. The coils 23 and 25 are made up of a series of short pipes and bonds to form a coil, the pipes of which extend across, while the coils 24 and 26 extend from the front to the rear of the boiler. The coil 23 is connected at the front with the coil 2-1, the coil 24 with the coil 25, and this with the coil 26, the end 27 being connected with the pump or injector supplying the water to the boiler, so that the water will pass through every pipe of the coil 26, thence through the coils 25, 24, and 23, from which it enters the T 22, and, dividing, passes through the pipes 21,20, and 19 to the watermultiple 5, as is shown in Fig. Immediately below the entrance of the feed-water into the center of the rear section of the water-multiple 5 the sediment-pocket 23 is placed, eonnect-ed with the blow-01f pipe 20, which pipe is at a convenient point provided with a suitable Valve.

The steam-multiple 16 provided with a central outlet, and is secured to the separator 30, consisting of a cylindrical section in which the spiral partition 31 forms the spiral passage 32 The passage 33 is closed on top, but is open at the bottom, and the central part is closed about the middle vertically by the horizontal partition 34:. 35 is the steam-outlet; 36, the water-drum, and 37 the connections between the water-drum and the two ends of the water-multiple 5. The casing or housing 38 is lined on the inside with fire-resisting material. The fine connects with the chimney.

The circulation of the water in this improved form of steanrgenerator is very rapid in the side pipes 11,1'oof-pipes 12, and the central vertical pipes 13, and consequently considerable water is carried over with the steam. To separate the water from the steam is the office of the separator. The steam and water on entering the separator are deflected upward and sidewisc by the partition 31, and forced to follow the passage 32 between the cylinder and the partition. As the steam and water reach the part33 of thespiral passage the water runsdown into the water-drum 3G. The bottom of that portion of the spiral passage being open, the steam passing through the upper part of the spiral passage enters the central space above the horizontal partition 31, which partition is placed at a point above the steam-inlet to the separator. By this construction the steam and the water contained in the steam are forced in contact with the inner shell of the separator and the surfaces of the spiral partition 31. The water readily collects on these surfaces and descends along them into the Water-drum 36, while the steam by its levity rises upward and leaves the generator freed from the Water. Any sudden draft of steam causes the violent ebullition of the Water in a steam-generator by the reduction of the steam-pressure. By the use of the partition the direct connection through the central opening of the separator is closed and the local effect of the reduc tion of pressure and consequent priming is thus prevented.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a pipe or tube steamgenerator, the combination, with the multiple 16 and the nipple 15, of a tourln-auch fitting adapted to receive four of the generator-pipes and connect the same with the multiple by means of said nipple, as described.

2. In a steam-generator, the combination, with the water-multiple 5 and nipples 9, of the two-branch fittings 10, the pipes 11, 12, and 13, the four-branch fitting 14, nipple 15, and steam-nmltiple 16, constructed to form the sides and the root of the lire-box, as described.

3. The combination, in a pipe-boiler, with the water-multiple, the two-branch fittings 10, and the pipes 11, 12, and 13, connected with the steam-multiple, of the pipes 17, the coil 18, the steam-multiple 16, the feed- Water coils, and the pipes 19, connecting the feed-water coils with the water-multiple, as

described.

t. In combination, the water-multiple 5 and the pipes 11, 17, 19, and 12, inclosing the fire-box, the pipes 13 and coils 18, connected,

with the steam-multiple, the teed-water heating-coils 23, 24-, 25, and 26, the steam-separator connected with the steam-multiple and the water-multiple, and the casing 38,131-0- vided with the door 8, as described.

5. The combination, with a steam-generator, of a separator provided with inlet and outlet openings and consisting of a cylindrical vessel divided by a spiral partition into a continuous spiral passage closed at the upper end except the central space, which is closed above the inlet-opening, as described.

(3. The combination, with a pipe-boiler, of the separator 30, the spiral partition 31, the passages and 33, closed at their upper ends, the partition 34, closing the central space above the steam-inlet, and the water-drum 36, constructed to separate the water from the steam, as described.

DARWIN ALMY.

itnessesr M. F. BLIcn, J. A. lVIILLER, Jr. 

